It ________ nearly two weeks ______ I had received his letter.
| A．is, that | B．was, that | C．is since | D．was, since |
There are over 58000 rocky objects in ______space，about 900 of which could fall down onto ______ earth.
| A．the; the | B．/; the | C．the; / | D．a; the |
--So you missed the important meeting yesterday?
--_________. I got there five minutes before it was finished.
| A．No way | B．Not exactly | C．No doubt | D．All right |
—Will you complete the task in time?
—Surely, I will. _________.
| A．Everything is possible | B．But it’s too hard |
| C．No matter what will happen | D．Though it’s a piece of cake |
--So you know Catherine?
---Yes, it was last week_____ she came to visit my roommate Jane.
| A．that | B．when | C．since | D．before |
________there are a large number of chemical factories, the air is likely to be polluted.
| A．Where | B．That | C．Though | D．As |