Our teacher is strict ________us ________everything.
It’s two and a half weeks since the exchange students __________ Wuxi.
Little Tom has got a lot of birthday presents, but he isn’t able to take all of them ___.
We can have ___ bluer sky if we create ___ less polluted world.
---- I’m too nervous to give a talk in front of so many people. ---- __________, Maria. You can do it.
----- I haven’t heard from Henry for a long time.----- What do you think ___________ to him?