It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
It’s not proper for you to ________ the truth from your parents.
They dedicated a monument ________ those who died in the great earthquake.
Einstein liked Bose’s paper so much that he________his own work and translated it into German.
You know,the tickets for Jay’s concert can ________ online from tomorrow.
________ the Internet is of great help,I don’t think it’s a good idea to spend too much time on it.