Most children are interested in amazing things, and they wonder ______.
| A．When can they see UFOs. |
| B．how can elephants walk on tiptoe |
| C．why do fish sleep with their eyes open |
| D．why there is no plant life without lightening |
The computer still works well, we _____ buy a new one at the moment.
| A．have to | B．must |
| C．don’t have to | D．don’t need |
--When ___________ your brother ___________ his hometown?
---He ____________ for nearly three years.
| A．has, left; has been away |
| B．did, leave; has left |
| C．has, left; has left |
| D．did, leave; has been away |
---I think communication by email is better and much easier. Do you think so?
---__________ I agree with you.
| A．In some way | B．In the way |
| C．In some ways | D．By the way、 |
How _______ it is to feel the roller coaster _______ at full speed!
| A．exciting; to move | B．excited; move |
| C．exciting; move | D．excited; to move |
Don’t get off the bus __________ it stops.
| A．after | B．until | C．when | D．since |