1.Cellulose is indigestible by humans, but herbivores, such as cows and horses, ____ it because they retainit long enough for digestion by micro-organismspresent in their digestive system. A) can digest
B) have to digest
C) used to digest
D) have digested
2. You ____ all your holiday money on the first day. Youwill need some for the rest of the week.
A) didn’t use to spend
B) mustn’t spend
C) don’t spend
D) might not spend
3.Using lasers to produce extremely short andrepeatable pulses of light, today scientists ____events happening in time intervals as short as 1,000trillionth of a second.
A) must have measured
B) were measuring
C) used to measure
D) are able to measure
4.Living cells exist in a variety of shapes; for example, they ____ cube-shaped or flat
A) may be
B) must be
C) were
D) have been
5.We ____ the football match on television yesterday, but we ____ because there was a power cut.
A) should be watching / may not
B) were supposed to watch / haven’t
C) were going to watch / couldn’t
D) had better watch / needn’t
6.Oh no, look at the sign! We ____ here. These spacesare for doctors and emergency patients only.
A) needn’t have parked
B) won’t be parking
C) haven’t got to park
D) aren’t supposed to park
7.You ____ your children some freedom; otherwise, theywill resent you.
A) used to allow
B) must allow
C) have allowed
D) allow
8.It’s not easy learning Turkish at home. Do you think I____an evening course?
A) must have taken
B) have taken
C) should take
D) had to take
9.I refused to give my son any money for the “MegaDeath” sweat–shirt he wants to buy, but I’m sure he’lltry to get some from his grandmother. I’d reallyrather she ____ him the money, because I don’t wanthim to wear such an awful thing.
A) didn’t lend
B) won’t lend
C) not to lend
D) not lending
10.He ____ safety goggles, but he wasn’t and, as aresult, the hot steel badly damaged his eyes.
A) could have been wearing
B) must have been wearing
C) had been wearing
D) ought to have been wearing
Answers:
1. A
2. B
3. D
4. A
5. C
6. D
7. B
8. C
9. A
10. D
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