Bicycling is a good exercise;________ it does not pollute the air.
A. besides B. beside C. therefore D. otherwise
Please pass me the book ________ cover is green.
A. which B. whose C. that D. who
He hurried back home________ his schoolbag.
A. fetched B. to fetch C. fetching D. fetches
I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.
A. couldn’t B. mustn’t C. shouldn’t D. needn’t
So I rudely replied, “You’ve dialed the wrong number! ” and then ________.
A. hanged up B. hung up C. held on D. held up
His English ________ a lot since he took the course.
A. improved B. was improved C. has improved D. has been improved
