Hetalkedaboutthemenandbooks____interestedhimgreatlyintheschool.
A、that
B、when
C、who
D、which
Tammy:Someoneisatthedoctor.
Richard:______.
A、Whoishe?
B、Who'sit?
C、Whoheis?
D、Whoitis?
Whodoyousupposeistheman____ourteacheristalking?
Thetimehascome_____wemakeextensiveuseofnuclearenergy.
A、When
B、while
C、as
D、since
Itisimperativethatyou____hereintime.
A、shallarive
B、mustarrive
C、couldarrive
D、arrive