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A. one B. this C. that D. it

A. none of them B. both of them C. none of whom D. neither of whom

A. had been improved B. will be improved

C. is improved D. was improved

A. anyhow B. however

C. though D. totally

A. In reply to B. In addition to C. In charge of D. In place of

A．that B．where C．which D．what

A．that B．when C．where D．what

【題目】The chairman thought ________ necessary to invite Professor Smith to speak at the meeting.
A.that
B.it
C.this
D.him

— He raises his arm as a(n)______for us to stop.

A. mark B. signal

C. application D. goal

【題目】She was about to tell me the secret ________ someone patted her on the shoulder.
A.as
B.until
C.while
D.when