－It’s necessary to limit the speed of electric bikes.
－Yes, most riders of electric bikes in China 40-50 kilometers per hour often ignore red lights, the risk of traffic accidents.
| A．reaching; increase | B．reach; increase |
| C．to reach; to increase | D．reaching; increasing |
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When ____ a new word, you’d better _____ a dictionary.
| A．come across, refer to | B．coming across, consult |
| C．coming across, look up | D．come across, look through |
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After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed ______.
| A．in trouble | B．in case | C．in time | D．in vain |
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-- Better get down to your work, Jack.
--- _____________.
| A．It’s my pleasure | B．Not to mention it |
| C．Mind your own business | D．You’re welcome |
.
If you use another method to solve this problem, you’ll probably ______ it.
| A．make | B．get | C．finish | D．take |
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My hometown,_______ I spent my happy childhood, has changed a lot.
| A．when | B．where | C．which | D．since |