It is well-known to us all that knowledge is ____ treasure, but practice is ____ key to it. A a, ∕ B a, the C the, the D∕ , the
An unhappy childhood may have some negative effects on a person’s characters; however, they are not always_________,
––– Do you think it's a good idea to make friends with your students? –––________, I do. I think it's a great idea.
When ______ different cultures, we often pay attention only to the differences without noticing the many similarities.
My income is rather changeable, but I earn £73 a day ___________.
Nobody knows _______broke into the house last night and stole the important papers.