Two days _______enough for me to finish the work, I need a third day.
| A．isn’t | B．is | C．aren’t | D．are |
— Why weren't you at the meeting?
— I ________ for a long distance call from my sister in America.
| A．was waited | B．was waiting |
| C．has waited | D．have been waiting |
We have done things we ought not to have done and ________ undone things we ought to have done.
| A．left | B．leave |
| C．will leave | D．leaving |
The two ladies are ________ the same age, but there seems to be ten years ________ them.
| A．at, between | B．about, among |
| C．as, among | D．of, between |
--- I stayed at a hotel while in New York .
--- Oh, did you? You ＿＿＿＿ with Barbara．
| A．could have stayed | B．could stay | C．would stay | D．must have stayed |
The day breaks，______ the birds are singing.
| A．because | B．as | C．since | D．for |