My uncle is a doctor. He sometimes has to work _______ night.
| A．in | B．at | C．on | D．For |
She hardly ever speaks English because she is afraid ________ mistakes _______grammar.
| A．to make, of | B．to make, on |
| C．of making, at | D．of making, in |
I don’t know ______ he will be back ______ the Dragon Boat Festival.
| A．whether, on | B．if, in |
| C．whether, in | D．that, at |
---Have they finished ________ the Water Festival? ---No, they haven’t.
| A．celebrate | B．celebrated |
| C．celebrating | D．celebration |
---Excuse me. Do you know these English words? ---Sorry, I don’t. But you can __________ in a dictionary.
| A．look it up | B．look up it |
| C．look them up | D．look up them |
_______ nice day! Let’s go out to have a picnic.
| A．How | B．What | C．How a | D．What a |