The
weather in this area is generally warm，but it be very cold sometimes．
| A．must | B．can | C．should | D．need |
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 |
All the listeners were surprised at what the traveler had ______in the last ten months.
| A．gone through | B．gone over |
| C．gone for | D．gone on |
The little boy with an overcoat felt grateful _________ us for our letting him _______the game.
| A．for; join in | B．to; to join in |
| C．with; join | D．to; join in |