At a very young age, Professor Field used to__________ books on radio.
Personally, I think it is the sales manager, rather than the sales girls, _______ to blame.
----- I have booked a room for today and tomorrow. ----- _______, sir.
—Now that you like computers very much, isn’t it a good idea to get ______? —Well, I’d like to but I can’t afford that expensive a computer at present.
. ______ are allowed to take part in the outdoor activities.
How long do you think it will be ______ the Chinese people land on the moon?