Both Class 3 and our class won't be able to finish the work unless they ___ each other.
It’s already 9:00 and Lucy is ______ for us there.
—Hi, Li Ming. Where are you going? —Oh, it’s you—Xiaohui. I ______ you.
The doctor ______ you for your cough is sure to _____ it.
It’s his laziness that ________ his failure in the last exam.
He is_______to have come back from the abroad.