5. It/be/ necessary/you/ practice English / every day /.
Alt is don't necessary for you to practicing English every day.
B.It is necessary for you to practice English every day.
C .It is necessary for you to practice English every day.
D. It is necessary for you to practiced English every day.
6.1/look forward/receive/reply.
A. I look forward to receive your reply.
C. I look forward receive your reply.
B. I look forward to receiving your reply.
D. I look forward to receive your reply.
7. It/ not difficult /translate /this sentence /English.
A. It is not difficult for translate this sentence English.
B. It is not difficult to translate this sentence in to English.
C. It is not difficult that translating this sentence in to English.
D. It is not difficult translate this sentence in to English.