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单选题

It’snecessary_________usallto________

A
for,keepinglearning
B
to,keeplearning
C
of,keeptolearn
D
for,keeplearning

题目答案

D

答案解析

暂无解析
举一反三
单选题

Theforeigners_________there,butthey_________thefoodthereatfirst.

A
usedtolive,didn’tbeusedto
B
areusedtoliving,didn’tuseto
C
usedtolive,weren’tusedto
D
usedtoliving,usedn’tto

题目答案

C

答案解析

暂无解析