__________ on Wechat is a common phenomenon, and more people hardly write letters．
| A．Communicate | B．Communicated |
| C．To communicate | D．Communicating |
Every minute must be made full use of ____ our lessons, for the final examination is coming.
| A．going over | B．to go over |
| C．go over | D．to going over |
The foreigner does speak Chinese well, but of course not _____ we Chinese.
| A．as fluent as | B．more fluent than |
| C．so fluently as | D．much fluently than |
The reason _____ he refused to attend the meeting was that they didn’t give him an invitation earlier.
| A．how | B．which | C．why | D．because |
—Thank you for joining in our conversation tonight.
—_____.
| A．It’s my duty | B．It’s all right |
| C．It’s my pleasure | D．With pleasure |
It was in the street_________ I met Mary yesterday .
| A．that | B．when | C．where | D．what |