ⅰ.单项填空
1. the government needs to ______ the problem of unemployment.
a. deal b. address
c. promote d. practice
2. eating too much fat can ______ heart disease and cause high blood pressure.
a. relate to b. tend to
c. devote to d. contribute to
3. ______ is no doubt that he will pass the examination because he has prepared for it for a long time.
a. it b. there
c. what d. as
4. playing on a frozen sports field sounds like a lot of fun. isn't it rather risky, ______？
a. though b. also
c. either d. yet
5. they also developed their own language, ______ there are now approximately sixty varieties.
a. of which b. in which
c. for which d. with which
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