单项选择题
He could not guess how they managed（）.
A.doing thisB.to doing thisC.to do thisD.do this
单项选择题 If they would come，he（）Martin buy this equipment.
单项选择题 The country is（）known deposits of coal and iron.
单项选择题 I want to talk over the report with you（）sending it to Mr.Smith.
