It’s bad for your eyes _______ computer games too much.
| A．plays | B．to play |
| C．playing | D．play |
–_______________ does a CRH train run? –It runs up to more than 300 km an hour.
| A．How long | B．How far | C．How fast | D．How soon |
You shouldn’t keep a pet _______________ you have enough time to care for it.
| A．if | B．unless | C．though | D．when |
___________ the young girl ___________ her parents take regular exercise in order to keep fit.
| A．Not ... but | B．Either ... or | C．Neither ... nor | D．Not only ... but also |
Generally speaking, a computer works _______________ a human brain.
| A．more accurately than | B．more accurate than |
| C．as accurate as | D．so accurately as |
Nowadays, children under 1.4 meters _______________ be free to take buses in some cities.
| A．need | B．must | C．shall | D．can |