The earth became so violent that it was not clear_________ the shape would last or not.
#32770
A
if
B
how
C
whether
D
why
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_______you’ve tried it, you can’t imagine how pleasant it is.
#30905
A
Unless
B
Because
C
Although
D
When
____ you read English easily, you’ll find it’s another cup of tea to make conversation in English.
#32011
A
Because
B
As though
C
Even if
D
Whether
I won't give you such help_____ you beg me. It's beyond my ability.
#30778
A
until
B
unless
C
as if
D
even if