1编号：4124题型：单选题测试正确率：35.8%
______ we do something to protect the environment.
2编号：4123题型：单选题测试正确率：38.51%
Protecting the environment is a ______ activity.
3编号：4122题型：单选题测试正确率：79.61%
Don’t forget to ______ the lights when you leave.
4编号：4121题型：单选题测试正确率：55.68%
We can travel by bike______ by car.
5编号：4120题型：单选题测试正确率：50.49%
It’s more ______ to take the underground in Beijing.
6编号：4119题型：单选题测试正确率：72.49%
He told me some useful _______ just now.
7编号：4118题型：单选题测试正确率：63.07%
______ improve our English, we should study harder.
8编号：4117题型：单选题测试正确率：60.19%
If you are ______ studying, you may take a rest.
9编号：4116题型：单选题测试正确率：57.93%
We should learn to ______ the new invention.
10编号：4115题型：单选题测试正确率：46.28%
The activity is ______ by the government.
提醒:
