— I’m afraid I can only make a small contribution this time.—____.We really appreciate your assistance.
You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future.
Could I speak to ________ is in charge of International Sales,please?
The traditional view is ________ we sleep because our brain is “programmed” to make us do so.
The new technology will make ________possible to grow food with very little water.
________ matters most in learning English is enough practice.