(2013·高考江苏卷)I should not have laughed if I________ you were serious.
#99715
A
thought
B
would think
C
had thought
D
have thought
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Students taking the course _____to finish their homework with the help of computers.
#103877
A
are encouraged
B
have encouraged
C
are encouraging
D
had been encouraged
. ---- How long ____ at this job? ---- Since 1990.
#102924
A
were you employed
B
have you been employed
C
had you been employed
D
will you be employed