单选题 Headaches, dizziness are possible ______ of high blood pressure.

单选题 Shopping-centers provide us with a large ______ of goods to choose from.

单选题 We were astonished ______ the temple still in its original condition.

单选题 If you want to get the drivers' ______ you should take some courses first in the traffic school.

单选题 John was asked to ______ the man who stole his wallet.

单选题 She pretended ______ me when I passed by.

单选题 The police officers here do not usually ______ guns.

单选题 He told us whether ______ a picnic was still under discussion.

单选题 Coffee is said to have ______ effects.