一、单项选择( ) 1. Teenagers have to be 18 years old before they ____to drive a car.A．are allowed B．allowedC．will be allowed D．allow( ) 2. As China grows stronger and stronger, Chinese ____in more and more schools out of our country. A．teaches B．is taughtC．has taught D．was taught( ) 3. —Your bedroom is so clean.—Of course.It ________every day.A．cleans B．cleanedC．is cleaned D．was cleaned( ) 4. It's not your turn yet.Please wait on the chair over there until you__________.A．are calling B．have calledC．are called( ) 5. Hangzhou ____as the City of Silk.Tourists like shopping for silk there.A．knows B．is knownC．was known D．will be known( ) 6．—Why does the earth look blue in space?—Because most of the earth's surface ______ by water.A．covers B．is coveredC．cover D．are covered( ) 7．Students do less homework now.Usually it ______ before 9 o'clock in the evening.A．finishes B．finishedC．is finished D．was finished( ) 8．—Your classroom is so clean.—Of course.It _______ every day.A．is cleaned B．was cleanedC．cleans D．cleaned ( ) 9．A lot of trees __ |
