We were caught in________ heavy rain but afterwards we enjoyed_________ bluer and cleaner sky.
| A．a, the | B．不填; the | C．a, a | D．不填; the |
My sister，as well as her classmates who ________ late for class，________ criticized by Mr.Hunt.
| A．were；was |
| B．was；were |
| C．was；was |
| D．were；were |
His purpose ________ going to the US is ________ for his uncle.
| A．of；looking |
| B．in；looking |
| C．in；to look |
| D．of；to look |
The scientist________ the behavior of the mice after they were given the drug.
| A．looked |
| B．observed |
| C．noticed |
| D．watched |
It may rain，but I shall go out ________.
| A．somehow |
| B．anyhow |
| C．somewhat |
| D．anywhere |
Though plastic bags really bring convenience to us，they also ________ many problems for the environment.
| A．lead to |
| B．refer to |
| C．contribute to |
| D．appeal to |