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[单选题]
___ he came to study in the university, he has made much progress in the study of English.
A、While
B、When
C、Since
D、After
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A、While
B、When
C、Since
D、After
A.to sit/tying
B.sitting/tying
C.seating/tied
D.seated/tied
A.speak
B.to speak
C.spoke
D.spoken
A.while
B.until
C.since
D.when
B.isn't decided
C.hasn't decided
D.doesn't decide
A. advocated
B. confirmed
C. insured
D. promised
A、Then the hour came
B、The hour then came
C、Then came the hour
D、Then did the hour come
A.coming
B.had come
C.came
D.to come
A.experience
B.experiment
C.exploration
D.exposure
A、had come
B、came
C、would come
D、comes