4．There has been more than 100 million references to the word "tuhao" on social media since early September.____________

　　[答案]　has→have

　　5．The famous actor was reported have gone abroad.____________

　　[答案]　have前加to

　　Ⅳ.单句写作

　　1．He pretended ________________ (正在读) the text when the teacher came in.

　　[答案]　to be reading

　　2．There ________________ (一定有个机会) for you to go to Beijing.

　　[答案]　must be a chance

　　3．The town was cut off from the rest of the world ___________ (因为大雪)．

　　[答案]　due to heavy snow

　　4．Some old traditions ________________， which is noticed by the government. (正在逐渐消亡)．

　　[答案]　are dying out

　　5．He tried his best to ____________ (使自己适应) the life there.

　　[答案]　adapt himself to

V.语法填空

(2017·全国卷Ⅰ)There has been a recent trend in the food service industry toward lower fat content and less salt. This trend, which was started by the medical community (医学界) 1.______________ a method of fighting heart disease, has had some unintended side 2.______________ (effect) such as overweight and heart disease-the