He has failed times,but he won't give up a chance.( )
A.third,fourB.three,fourth
C.third,fourth
________ the weather improves, we’ll have to cancel the outdoor picnic.
Unless
If
Because
When
—Could you tell me ________ pay the bills?
—You can pay your bills through Alipay(支付宝)online.
how much I’ll
how many I’ll
how can I
how I can
Neither Saturday nor Sunday________ OK because I will be quite busy these two days.
are
is
am
be
The Forbidden City (紫禁城), the largest palace in the world, ________ more than 600 years ago.
built
were built
was built up
was building
Students ________ play with fire in the classroom. It’s quite dangerous.
mustn’t
must
couldn’t
could