I will tell my daughter as soon as she _________ back from work.
| A．will come | B．would come | C．comes | D．came |
—A number of students________in the dining hall．
—Let me count．The number of the students________about 400．
A．are；is
B．is；are
C．are；are
She put back the book she had taken________mistake．
| A．in |
| B．up |
| C．to |
| D．by |
________it rains heavily，they go on working outside．
| A．How |
| B．Why |
| C．Although |
| D．What |
What________is the most helpful invention？
| A．you think |
| B．I think |
| C．you do think |
| D．do you think |
The dinner didn’t start________all the friends arrived．
| A．since |
| B．until |
| C．while |
| D．by |