问题
选择题
Only when our country has aircraft carriers (航空母舰), _____________ our distant islands more effectively.
A．we can guard
B．can we guard
C．we guard
D．do we guard
答案
答案：B
考查only引导的的部分倒装句。Only引导的倒装句必须满足两个条件，only必须放在句首，必须强调状语。本题满足这两个条件，所以选择B。