Steve Jobs was full of always coming up with new ideas which led to great changes in society．（ ）
A．instructionB．invitation
C．introductionD．invention
High﹣speed railways have developed rapidly in our country． Today China has high﹣speed rail network（铁路网） among all the countries in the world．（ ）
A．longB．longer
C．the longerD．the longest
China's star skater Wu Dajing won the gold in the men's 500 meters in Pyeong Chang Winter Olympic Games， setting a world record time of 39.584 seconds．
exciting news it is! Let's give him the thumbs﹣up（点赞）!（ ）
A．WhatB．What anC．HowD．How an
Be quick， we'll fail to catch the school bus．
Don't worry． It's only seven o'clock now． We still have enough time．（ ）
A．andB．butC．orD．so
Listen! It's raining outside．
Wow， look! The yard is full of rainwater now!（ ）
A．stronglyB．hardlyC．greatlyD．heavily
Excuse me， sir． Are you sure the umbrella in your hand belongs to you？
Oh， sorry． I took it ． Mine is over there under the chair．（ ）
A．at onceB．on timeC．by mistakeD．in all