--People should use public transport instead of their own private cars.--- _______.The roads are too crowded as it is.

Though having failed several times, Tim, who didn’t give up his dream, _____ made his dream come true.

I’m worn out,____,the bike doesn’t work well,___ I can’t go further.

The boys are doing no harm; they are ___ playing．

Drunk driving used to occur _____, but now it is under control．