Does Tom _____ a brother—No, he _____ .

Although he is very old, ______ he works very hard.

Michael was late for MrSmith’s oral class this morning.— How come? ________ I know, he never came late to class[ ]

______ about the missing Beijing-bound Malaysian flight that he decided to look for more information about it.

Without the timely aid from different provinces, the affected people in those areas ________ the difficulty.