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
There are a lot of trees on _______________ sides of Century Avenue in Pudong.
A. either B. all C. both D. neither
The football player felf extremely _______________ after they won the game.
A. luck B. lucky C. luckily D. unlucky