After we boarded the boat, it went on down the river, stopping ____ to take people in.
| A．more or less | B．now and then | C．sooner or later | D．up and down |
You can use a large plastic bottle, ________cut off, as a pot to grow your plants in.
| A．the top is | B．the top of which | C．whose top | D．with its top |
语音知识（共5小题；每小题1分，满分5分）
从A、B、C、D四个选项中，找出划线部分与所给单词划线部分读音相同的选项。
1．solution
A. gun B. hunt C. equal D. typhoon
2. stomachs
A. character B. sandwich C. bench D. known
3. bow
A. flow B. fellow C. cow D. tomorrow
4. theory
A. diary B. pioneer C. therefore D. really
5. exchange
A. expression B. exist C. examine D. exercise
In the past month, cruel snowstorms hit some European countries and America , _________great transportation problems in these countries.
| A．causing | B．caused | C．to cause | D．having caused |
With Halloween approaching, there exists a real concern among parents and teachers __________ trick or treating will become a seriously anti-social activity.
| A．whether | B．what | C．that | D．how |
When first __________ to the market, the computer software was not a success due to its complexity in operation.
| A．introducing | B．being introduced |
| C．introduced | D．to be introduced |