语法与词汇It was very hard to (grasp) what he actually meant.
语法与词汇The students had a lot of trouble (concentrating) on their study because of the noise from the construction outside.
语法与词汇It''s (tough) looking for a job these days.
语法与词汇I think this is a (deliberate) insult.
语法与词汇A feeling of good fellowship prevailed at the social gathering.
语法与词汇A central objective of the developed country was to (alleviate) the problems of the urban poor.
语法与词汇He stretched the rubber band till it snapped.
语法与词汇My little daughter kept pulling my hair and I was really (annoyed).
语法与词汇His novel was adapted for the stage in 1949 as a musical play (entitled) as St. Louis woman.
语法与词汇Even before an infant is born, tiny teeth are developing (within) his gums.
语法与词汇For children, playing is an automatic and integrate (component) of growing up.
语法与词汇Color changes in chameleons (seem) to be caused by environmental temperature as well as by other external stimuli.
语法与词汇The workers finally (called off) the strike.
语法与词汇Our income has got smaller, so we must be realistic and give up our car.
语法与词汇The town is (famous) for its magnificent church towers.
语法与词汇{{U}}Practically{{/U}} all animals communicate through sounds
语法与词汇Navajo Indians create sand paintings by arranging grains of sand, ground-up minerals, and seeds of various colors into (designs).
语法与词汇The New Year is coming. We decided to give our room a (thorough) clean.
语法与词汇Her voice is distinct and (unique). You can tell her voice immediately.
语法与词汇A careless person is apt to make mistakes