It will ______us several years to learn a foreign language well.
Each of the students a Chinese-English dictionary.,
-I wonder if your wife will go to the party.-If your wife ____ ,so _______ .
_____ the students in our school is about 5000,_______ of them are boys.
________ plastic bags we use, ________ it will be to the environment.
Noise pollution can cause people to become sick. So our government has done________to stop it.