My brother’s irresponsible behavior_______ my mother many sleepless nights.
—Where___________I meet you tomorrow morning ? —I haven’t decided the place. But I’ll call you soon.
The problem referred to at the meeting, if___________in time , will have a bad effect on the environment.
In those hard days , we could not leave behind___________came to us for help.
Do you know how much time and effort they devoted___________such a complicated project ?
The government has___________a series of policies and measures to ensure the improvement in living standards.