He is very good ________ the children．
| A．for |
| B．to |
| C．at |
| D．with |
Which of the following signs can’t be found in a hospital?
—Our school is so big. We must clean it up as soon as possible.
—Don’t worry. ________.
| A．Better to be safe than sorry |
| B．It’s raining cats and dogs |
| C．Each dog has its day |
| D．Many hands make light work |
-Hello, Jenny. Your box looks so heavy. Let me give you a hand.
-_______I'm OK.
| A．That's all right. | B．No, thanks. |
| C．Well done. | D．You are welcome. |
His father had an important meeting just now, _______?
| A．did he | B．had he |
| C．didn't he | D．hadn't he |
-_______ can the batteries (电池) keep these cool iPhones and iPads working?
- For about ten hours.
| A．How much | B．How many |
| C．How long | D．How often |