The children,____ had played the whole day long, were worn out.
| A．all of what | B．all of which | C．all of them | D．all of whom |
In order to keep fit, he chooses vegetables and fruit in ____to any kind of meat.
| A．comparison | B．preference | C．control | D．advantage |
If you want to study in foreign countries, ____ good knowledge of the culture is regarded as ____ must for you to live happily.
| A．/; / | B．a; a | C．the; the | D．the; a |
－How would you like your coffee?
－____.
| A．It’s very good | B．Tasty |
| C．Just black, please | D．There is too much milk |
As we all know, water ______ hydrogen and oxygen.
| A．makes up | B．is consisted of | C．consists of | D．consists in |
When _____ help, one often says “Thank you.” or “it’s kind of you”
| A．offering | B．to offer | C．to be offered | D．offered |