-Look at this model plane. Michael made it all by ______.
A. myself B. himself C. herself
-Time is up. I have to go now.
-Oh, it's raining heavily outside. You'd better wait here ______ it stops.
A. until B. while C. since
It's reported that the 31st Olympic Games ______ the Rio the Janeiro（里约热内卢）of Brazil in August, 2016.
A. is held B. was held C. will be held
-We're glad to hear that Putian has become one of the national civilized cities.
-Yes. Our city is getting ______ than before.
A. beautiful B. more beautiful C. the most beautiful
Look! The twins are carrying the table away, because it _______ too much space.
A. makes up B. picks up C. takes up
Shandong illegal vaccine scandal（非法疫苗丑闻）caused people to pay more attention to children's ______.
A. health B. weight C. wealth
