—How did he get my telephone number?
—You ________ it . You told him last week．
A．should have forgotten B．may have forgotten
C．must have forgotten D．could have forgotten
When I got back home, I saw a message pinned to the door “ Sorry to miss you, I will call later.”
A．read B．reads C．to read D．reading
Present at the meeting ．
A．Mr. Liu was, who taught us English
B．was Mr. Liu, who taught us English
C．was who taught us English, Mr. Liu
D．Mr. Liu, who taught us English, was
Scientists are convinced _____ the positive effect of laughter _____ physical and mental health．
A．of; on B．by; in C．of; at D．on; at
What would have happened, as far as the river bank?
A．Bob had walked farther B．if Bob should walk farther
C．if Bob walked farther D．had Bob walked farther
Rather than on a crowded bus, he always prefers a bicycle．
A．ride; ride B．riding; ride C．ride; to ride D．to ride; riding
