I was doing my homework _______ my mother was doing some sewing.
| A．during | B．when |
| C．while | D．after |
相关试题
Great changes _____ in my hometown since 1980.
| A．have been taken place | B．took place |
| C．have taken place | D．were taken place |
---I’m not hungry but thirsty.
---________
| A．I’m hungry, too. | B．What about some cakes? |
| C．I’m happy to hear that. | D．How about a glass of water? |
In which of the following places can you often see this sign?
| A．In a park. | B．In a school |
| C．In a science museum. | D．In a street |
— We can use QQ to talk with each other online.
— Really? Could you please show me _______ it?
| A．what to do | B．how to do | C．when to do | D．why to do |
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