Had they known what was coming next, they _________second thoughts.
He has been working hard day and night, which, of course,his tiredness.
I can't imagine therebe a shortage of water in Yunnan, the southwest of China where there used to be adequate rain. A. couldBmustC. might D. should
His parents,__ ,did not look after him very well: the elbows of his jacket and his boots were badly worn.
——Do___________ you have the Harry Potter books by J. K. Rowling in your shop? —Sorry, there isleft at the moment.
He made it clear that only the point that new technologies hold the key to increasing productivity the economy in the long run.