--I don't think we have met before.--Yes, once at a party, but we___________.
____much advice I gave him, he did exactly what he wanted to do.
Generally speaking, _____ according to the derections , the drug has no side effect.
Someone called me up in the middle of the night, but they hung up _____ I could answer the phone.
--- May I go and play with Tom this afternoon, Mum? ---No. You can't go out _____ your homework is being done.
The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this.