题目内容
Life is like riding a bicycle. ________ your balance, you must keep moving.
| A．Keeping | B．To keep |
| C．Keep | D．Having kept |
B
解析
巧学巧练系列答案________at the cafeteria before，Tina didn’t want to eat there again. (2013·山东，33)
| A．Having eaten | B．To eat |
| C．Eat | D．Eating |
The mother，________ in the kitchen，totally forgot the medicine on the table within the child’s reach.
| A．to be occupied | B．occupied |
| C．occupying | D．being occupied |
Unless ________ to answer questions, the pupils won't talk in Mrs Smith's class.
| A．asking | B．asked |
| C．being asked | D．having asked |
________ the earth to be flat, many feared that Columbus would fall off the edge of the earth.
| A．Having believed | B．Believing |
| C．Believed | D．To believe |
The Diaoyu islands have been part of China's territory since ancient times, ________ as important fishing grounds of Taiwan.
| A．served | B．to serve |
| C．serving | D．having served |
________ by strong snowstorms, the area faced severe water and electricity shortage.
| A．Struck | B．Having struck |
| C．Striking | D．Be struck |
________ the right kind of training，these teenage soccer players may one day grow the international stars.
| A．Giving | B．Having given |
| C．To give | D．Given |