The cost of sales makes up a large part of the prices that _____.
| A．are paid for all products |
| B．all products are paid |
| C．for which all products are paid |
| D．for all products paid |
I was glad to meet Jenny again, _________ I didn’t want to spend all day with her.
| A．but | B．and | C．so | D．or |
It was _________ cold winter night and the moon was shinning brightly across _________ night sky.
| A．不填；a | B．a; the |
| C．the; a | D．the;不填 |
If nothing _________, the oceans will turn into fish deserts.
| A．does | B．had been done |
| C．will do | D．is done |
Hurry up! Jack and Carol _________for us.
| A．wait | B．are waiting |
| C．have waited | D．will wait |
—Why didn’t you tell him about the meeting？
—He rushed out of the classroom _______ I could say a word.
| A．before | B．until | C．when | D．after |