Giải thích 
----- Nội dung dịch tự động từ ảnh -----
uestion 12. Let's
up the beach on Sunday mornings.
B. to clean
A. cleaning
uestion 13. Factories
A. will
estion14. The road was flooded
A. because
C. cleans
waste into rivers if the government fines them heavily.
C. would
the heavy rain last night.
D. clean
B. won't
D. wouldn't
B. since
C. because of
D. as
15
Lon?