Don’t all speak at once! ___ please.
| A．Each at one time | B．One by one time | C．One for each time | D．One at a time |
Isnecessary to complete the design before National Day?
| A．this | B．that | C．it | D．he |
It was not until 1920regular radio broadcast began.
| A．while | B．which | C．that | D．since |
Generally speaking,according to the directions,the drug has no side effect.
| A．when taking | B．when taken |
| C．when to take | D．when to be taken |
Theyus on duck and green peas.
| A．serve | B．feed | C．feast | D．treat |
—Shall we go swimming?
—OK.I’ll go and get.
| A．changed | B．to change |
| C．to be changed | D．changing |