31. _______ with the present situation, the local government could not find effective measures to reduce the risk of coal mine accidents.
| A．Though unsatisfied | B．As unsatisfied |
| C．Though unsatisfied it was | D．As it was unsatisfied |
_____ is necessary for us to tell him about the result.
| A．That | B．This | C．It | D．What |
Mrs Chen is very strict — we don’t dare to say a word _____ she asks us to.
| A．until | B．before | C．when | D．unless |
– The lecture will begin at 4 o’clock in the afternoon, right?
– Yeah, ____ you get there on time.
| A．make sure | B．be sure | C．for sure | D．it is sure |
– Tom has made great progress in spelling.
– So he has and _____.
| A．so do you | B．so have you | C．so you do | D．so you have |
The mayor will go to Beijing by train _____ by air.
| A．instead of | B．instead | C．in place of | D．in place |