He found _______ difficult to study maths.
A、itA
暫無解析
China is a mountainous country.Hills,mountains,and plateaus cover _______ of the total area.
In the U.K.,the Queen's Silver Jubilee is in _______.
NeitherEnglishnorChinese________difficulttolearn.
Thevolleyballmatchwastelevised________onCCTV.
_______ in thought, he almost ran into the car in front of him.
