—Tina, is that our math teacher Mr. Wang?
—It ________ be Mr. Wang. He has gone to Beijing.
must
mustn’t
can’t
can
The second Sunday of May is ______ Mother’s Day. It’s ______special day for children to show their love for their mothers.
—Simon,I wonder _______. —Last Saturday.
We’ll do what we can ______ English well this term.
--Thank you for your valuable advice. --________________.
China is large than _______country in Asia(亚洲).