We are now in the age of great changes. Everything sometimes ________ before it is felt.
#99951
A
change
B
had changed
C
has changed
D
changed
推荐题目
________ repeatedly, the problem still appeared in the beginners’ homework.
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A
Explaining
B
Having explained
C
Having been explained
D
To be explained
My sister ______ interested in math after ______ long talk with her last September.
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A
has become; my
B
became; mine
C
is; I
D
is; my
—I wonder if you could go with me to the supermarket.—Sorry. I _______ my experiment report all the morning and haven’t finished yet.
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A
write
B
was writing
C
have written
D
have been writing
The teacher said that Columbus _______America in 1492.
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A
discovered
B
found
C
had discovered
D
had found