The water in this river is harmful because It’s a ______ river.
We should encourage our students _____ hard instead of ____ too much time playing games.
More and more couples would rather _________ a second baby __________ their first child can feel less lonely.
---I can’t believe you finished the work so quickly. ---That’s because several classmates helped me. No wonder they say _______.
The young man complainedthe managerthe noise there.
---Shall we go for a picnic in the forest park tomorrow? ---Yes, ________ it rains heavily.