新概念英語(yǔ)第四冊(cè)課后習(xí)題及答案Lesson 2

字號(hào):

Lesson 2
    5 it would ____a__ impossible for us to live in this world if insects had no enemies.
    A make it b stay c be d have it
    6 we owe __c____ to the birds and beast who eat insects.
    A a great deal b a lot of c a great many d much of
    7 how many spiders are involved _____a_ this work on our behalf?
    A at b for c in d to
    8 there are many different ___a___ spider
    A sort of b kind of c type of d kind