The teacher explained the lessons slowly.... .
A.to understand them clearly
B.so that his students could understand them clearly
C.in order to understand them clearly
D.so as his students understand them clearly

I will behave toward them.... I would like to be treated.
A.as
B.as though
C.as if
D.so as to

He.... there 5 years ago and.... back since.
A.went / has not been
B.have gone / will not be
C.was going / am not
D.had gone / was not

Those drivers.... for three hours when a heavy storm suddenly.... .
A.were driving / broke
B.drove / was breaking
C.had driven / was breaking
D.had been driving / broke

I.... to visit you yesterday, but you.... at home.
A.have come / are not
B.had come / were not
C.came / were not
D.was coming / have not been

What.... when the accident….?
A.have you been doing / occurs
B.are you doing / will occur
C.will you be doing / has occurred
D.were you doing / occurred

We.... TV when it.... to rain.
A.are watching / will start
B.
have watched / will be starting
C.had watched / was starting
D.were watching / started

He was in.... he almost pushed me over on the stairs.
A.such a hurry that
B.such hurried that
C.so a hurry that
D.a hurry such that

................ that we left the movies before it ended.
A.The film was very boring
B.It was so a boring film
C.It was a too boring film
D.So boring was the film

She was.... I could not help looking at her.
A.very beautiful that
B.such beautiful that
C.so a beautiful girl that
D.so beautiful that