She was looking for her bicycle key _______she thought she might have put it.

填入下面一段文字横线处的语句，最恰当的一句是与镍氢电池等可充电电池相比，锂电池具有充电时间短、储能容量大等优势，因此一经上市就吸引了电动汽车制造商的注意。     。此外，其造价也相对昂贵。

se me, but is it possible for me to meet Mr. Smith in his office this afternoon________. How about 4:30

Look, the old man who is playing _______ guitar is ______ university teacher.

By helping others, students feel that they can make a ________.