Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state_____ they don’t age.
A. for which B. that C. where D. which
The machine has been used for man years. It’s no wonder that it doesn’t work well __________.
A. regularly B. constantly
C. frequently D. occasionally
Florida is blessed with ______ warm climate, which makes it _____ suitable place for old people to live in.
A. a; 不填 B. 不填; the C. a; a D. the; a
Some experts hold the view that fundamental construction is _____ the key to the little island development lies.
A. which B. what C. where D. why
A Chinese student’s print-like handwriting caused controversy among British Internet users, _____ both praise and questions about individuality.
A. having drawn B. drawing C. to draw D. drew
Tech-free tourism refers to traveling without a mobile phone or similar devices, particularly to places_____ block or cannot access Internet and cellular signals.
A. which B. where C. when D. who
