The exercises ________to be harder than we thought.You should practice more before the exam. Remember, practice makes perfect.
This old building was built in _____ .
I __ Ding Xi .
---____ do you travel? --- I take the train A How B. What C. When D. Where
Try your best to learn English , ___ difficult it is , you shouldn’t give it up.
----Who is the young man on the billboard(广告牌) ? ----He is Yao Ming , _____