What is Betty doing right now—She ______ her homework on the computer.

You know our manager has been in hospital for days? — YesI wonder if he is _____ better now [ ]

Learning foreign languages calls for your memory, time, patience and emotions_______,it is not a simple thing

____________ you give me a hand The box is too heavy. — No problem.

下列各句中,没有语病的一句是（  ）