There is no doubt _____ we will succeed if we try our best.

There is no doubt _______international cooperation is the key to dealing with cyber crime.

______ is no need for primary students to work at their desks all the long.

Simply ring me up,        I’ll come to your help as soon as possible.

____ the instructions on the packet when you take the drug and the drug, I think, will work soon.

Class regulations state _____ is the last to leave the classroom _____ off all the lights.

----Is it the first time you _______ Beijing?
----No. But the first time I ______ here, the city wasn’t so beautiful.