China’s population is expected to increase to about 1.5 billion in 2040, _____ it will start to decline slowly.
--How long ______ he ______ a fever?--- Ever since last night.
My bowl is empty. Who ______ all my soup?
I ______ you for a long time. Where ______ you ______?
Daddy promised me he ______ me a computer A. was bought B. had bought C bought D. would buy
They said they ______ do some sports if it was fine.