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【英语模拟题】
13. The socks were too small and it was only by _______ them that he managed to get them on.
A. spreading B. extending C. lengthening D. stretching
14. Language can be defined as a tool by which human beings ________ with one another.
A. associate B. connect C. communicate D. correspond
15. As a small boy, he was slow _______ learning to read and write.
A. on B. with C. in D. about
