China _______ rapid progress in space technology in the last 10 years.
—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.
After a long walk, they have ________.