Miss Wang _______ in three days because she is going to see her grandparents.
–– When did they arrive?–– They ______two hours ago .They ______ here for two hours .
----It’s important_____ a foreign language. ----I agree with you. We should study hard.
I ______ to think their jobs were ______ .
The maths problem is ______ hard for us ______ solve.
The girl was seen the piano at 4.00 yesterday afternoon.