A.The teacher has done his best to help all students, then, none of them made any effort on their part.
B.Although the teacher has done his best to help all students, none of them made any effort on their part.
C.Because the teacher has done his best to help all students, none of them made any effort on their part.
D.If the teacher has done his best to help all students, none of them made any effort on their part.

A.Hardly the man in black jacket had approached the bank when the guard stopped him.
B.Only when had the man in black jacket approached the bank, the guard stopped him.
C.No sooner had the man in black jacket approached the bank than the guard stopped him.
D.Not until had the man in black jacket approached the bank did the guard stop him.

A.The doctor strongly advised Jasmine to take a few days’ rest.
B.It is doctor's recommendation that Jasmine rested shortly.
C.Jasmine's doctor insisted that she should rest for a few days.
D.The doctor advised Jasmine not to take a short rest.

A.You persuaded her to join our club but she didn’t agree.
B.You didn't persuade her to join our club.
C.If I were in your position, I would persuade her to join our club.
D.It was essential to persuade her to join our club but you didn’t.

A.Tom encouraged Julie to do the decorating
B.Tom offered to do the decorating for Julie.
C.Tom promised Julie for doing the decorating.
D.Tom suggested to do the decorating for Julie.

A.Traveling abroad is what my brother usually does.
B.My brother has traveled abroad for a long time.
C.What my brother hasn’t done is traveling abroad.
D.My brother used to travel abroad.

A.Knowing about the Internet helped him invest in some computer companies.
B.He didn’t know much about the Internet so he didn’t invest in any computer companies.
C.Knowing about the Internet, he would have invested in some computer companies
D.He would have invested in some computer companies without his knowledge of the Internet.

A.Jack offered to go sailing that weekend.
B.Jack denied going sailing that weekend.
C.Jack refused to go sailing that weekend.
D.Jack suggested going sailing that weekend.

A.No sooner had he arrived at the airport than he called home.
B.He arrived at the airport sooner than he had expected.
C.Calling home, he said that he had arrived at the airport.
D.He arrived at the airport and called me to take him home.

A.No matter how hard you work, you will never be promoted here.
B.You will never be promoted here; however you work hard.
C.If you didn’t work hard, you would never be promoted here.
D.Although you work really hard, you will be promoted here.