We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
If we don’t take some measures to protect this kind of plant, it will ____ soon.
–Do you know who invented _______ telephone? - No, but it is really _______ most useful invention.
——Excuse me! Sir, is the swimming pool open all day? ——________.Only from 6:00 p.m. to 10:00 p.m.
——Are you satisfied with his answer? ——Not at all. It couldn’t have been________.
The universities have got bigger in size , ________many more middle school graduates the chance of higher education.