Had they not been working so hard，they______（not achieve)so much.

I ______ to the meeting on time, but I had a flat tire on the way.

A. would be

B. would have been

C. were

D. had been

请根据短文的内容，回答题。

The Building of the Pyramids

The oldest stone buildings in the world are the pyramids. They have stood for nearly 5,000 years, and it seems like that __________ (46). There are over eighty of them scattered along the banks of the Nile, some of which are different in shape from the true pyramids. The most famous of these are the "Step" pyramid and the "Bent" pyramid.＜br＞

Some of the pyramids still look much the same as they must have done when they were built thousands of years ago. Most of the damage suffered by the others has been at the hands of men who were looking for treasure or, more often, __________ (47). The dry climate of Egypt has helped to preserve the pyramids, and their very shape __________ (48). These are good reasons why they can still be seen today, but perhaps the most important is that they were planned to last for ever.＜br＞

It is practically certain that plans were made for the building of the pyramids __________ (49).＜br＞

However, there are no writings or pictures to show us how the Egyptians planned or built the pyramids themselves. Consequently, we are only able to guess at the methods used. Nevertheless,by examining the actual pyramids and various tools which have been found, archaeologists have formed a fairly clear picture of them.＜br＞

One thing is certain: there must have been months of careful planning __________ (50). The first thing they had to do was to choose a suitable place. You may think this would have been easy with miles and miles of empty desert around, but a pyramid could not be built just anywhere.＜br＞

Certain rules had to be followed, and certain problems had to be overcome.＜

第46题___________ 查看材料

A.for stone to use in modem buildings

B.has made them less likely to fall into ruin

C.before they could begin to build

D.because the plans of other large works have fortunately been preserved

E.while building the pyramids

F.they will continue to stand for thousands of years yet

A.been founded

B.founded

C.been rebuilt

D.rebuilt

He had some statues in his study. One was a lady ______ nothing but a bath towel.

A: wore

B: wears

C: to wear

D: wearing

Not until the game had begun ________ at the sports ground.

A) had he arrived

B) would he have arrived

C) did he arrive

D) should he have arrived

It's high time you _____.

A. start to work

B. would start to work

C. started to work

D. had started to work

A.hewastired

B.hehasbeenworkinghardforthelasteightmonths

C.hewantstoworkonanewproject

D.heaskedquestionsinamoreappropriateway

What are differences between Scrum and Waterfall？

A.Scrum review the program when the work is finished.

B.Waterfall cut the work to pieces.

C.Waterfall won’t go to next step until the step focused on has been done.

D.There’s no iterative or overlapping steps in the Waterfall model.

A．No more

B．Just a little

C．I’ve had enough

D．Yes, I would

Nobody knew ___________ there .

A.how long time l had been

B.how long had l been

C.how long time had l been

D.how long l had been