1. Steve lives in______European country, and he teaches in_______ university there.
A. an; a      B. an; the       C. a; a       D. a; an
2. Most of the villagers took part in the Dragon Boat races_______9:00 a.m.______  the morning of June 18.
A. at; in      B. at; on       C. on; in       D. on; on
3. _________people prefer HUAWEI phones, and about _______of them are adults.
A. The number of; four-fifths    B. A number of; four-fifth
C. A number of; four-fifths        D. The number of; four-five
4. --I’d like to buy a new oven.
--The ones over there sell well. You can ______ one by one to have a try.
A. turn on it                 B. turn it on  
C. turn on them             D. turn them on