They spent as many hours as they could ___their lessons.A.study B. to study C. studying
当你向别人打听某事时,你应该说:________。
找出都是三笔完成的一组字母:_______
下列字母________是元音字母,26个字母中第16个字母是________。
—Your pencil case is very nice. —________.
______ your teacher for your pen.