It is thought that one billion people in the world, _______is half the word’s workers, earn their living by farming.
| A．if | B．that | C．which | D．what |
While shopping, people sometimes can't help ________ into buying something they don't really need.
| A．persuade | B．to persuade | C．being persuaded | D．be persuaded |
The teacher bought many books for her students, which _____ 500.
| A．added | B．added to | C．added up | D．added up to |
My younger brother dreams ________________ a spaceman.
| A．to become | B．of be become | C．of becoming | D．becoming |
Is he honest? I find ____ hard to believe what he said.
| A．one | B．it | C．/ | D．that |
— Have you been here before?
— Yes. This is the third time that I ______ to Shanghai.
| A．come | B．came | C．have come | D．had come |