ief hid himself in the corner,．

Don’t be a phubber (低头族). Mobile phones help us a lot， _________ we shouldn’t allow them to control our lives.—We should take more activities outside to keep healthy.

You look so tired. Why not_______ a rest

My grandfather used to__ in the countryside, but now he is used to ____in Yongchuan city.

So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.