—English has a large vocabulary, hasn’t it?—Yes. _____ more words and expressions and you will find it easier to read and communicate. 
#91892
A
Known
B
Knowing
C
To know
D
Know
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At first, my new surroundings were difficult _________
#92147
A
to be tolerated
B
tolerating
C
to tolerate
D
being tolerated
To make China _________ the USA in science and technology, we need more talents. 
#92244
A
as a strong country as
B
strong as a country as
C
as strong a country as
D
as stronger as
-- _________ you called yesterday? -- Tom.Why?
#93721
A
Who it is that
B
Who is it that
C
Who was it that
D
Who it was that