The Changjiang River is one of ________ in the world.
| A．the longest river | B．the longest rivers |
| C．the longer river | D．longest river |
To make our city more beautiful, rubbish _________ into the river.
| A．needn’t be thrown | B．can’t thrown |
| C．mustn’t be thrown | D．may not thrown |
— Does your mother often _______ to you?
— Yes. But she always ________ the same words.
| A．talk; say | B．talk; says |
| C．speak; tells | D．talk; speaks |
---The students of Class 7 are going to the seaside this weekend.
---Remember _____ them not to keep _______ alone in the sea. It’s dangerous.
| A．telling; swimming | B．telling; to swim |
| C．to tell; to swim | D．to tell; swimming |
The twin sisters have learned a lot ________ they came to China.
| A．when | B．after |
| C．since | D．as soon as |
--It ______ be the new headmaster.
-- No, it ______ be him. He went to Beijing yesterday.
| A．can; must | B．must; can’t |
| C．can; can’t | D．must; may |