Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.
#93503
A
how
B
what
C
where
D
that
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________ your composition carefully, some spelling mistakes can be avoided.
#93577
A
Having checked
B
Check
C
If you check
D
To check
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
#92433
A
since
B
after
C
before
D
when
I wanted nothing but _____,_____ I stayed up all the night.
#95129
A
sleep; for
B
sleep; so
C
to sleep; so
D
to sleep; for
---- ____________ he has known the good news. ---- ______ is no wonder he is so excited.
#93716
A
It is likely that; It
B
It is probably that; There
C
He is likely that; There
D
He is possible that ; It