Mrs Chen is very strict — we don’t dare to say a word _____ she asks us to.
| A．until | B．before | C．when | D．unless |
It takes a lot of______ to become a good swimmer.
| A．train | B．exercise | C．practice | D．performance |
After three months, these young students finally became used to the ______ of life in a big city abroad.
| A．speed | B．pace | C．rate | D．frequency |
Although the working mother is very busy, she still_____ a lot of time to her children.
| A．devotes | B．spends | C．offers | D．provides |
Honesty is the most important______ a man can have.
| A．habit | B．manners | C．quality | D．effect |
Probability is the mathematical study of the _____ of an event's occurrence.
| A．desire | B．likelihood | C．result | D．effect |