—Mary can't help ______ the house. Why?—Because she is busy______ a hotel reservation.A. cleaning; making B. to clean; making C. cleaning; to make
– ______ we hand in the report this afternoon? – No, you needn’t. Tomorrow is just ok.
I don’t know ______.
It’s very nice ______ pictures for me.
English ______ in many countries, but Chinese ______ their own language.
How long have you ______?