A. a difficult B. a troublesome C. easy D. an easy
A.a difficult
B. a troublesome
C. easy
D. an easy
A.a difficult
B. a troublesome
C. easy
D. an easy
A.obscure
B. difficult
C. impossible
D. unable
The forest fire caused by the volcano is difficult to be______.
A. put off
B. put on
C. put out
D. put up
It is difficult ______a world record and even more difficult to ______it.
A. keeping, set
B. keep, set
C. set, keep
D. to set, keep
A. same
B. likely
C. alike
D. identical
Yao Ming said that______.
A. it was hard to watch NBA games on TV
B. playing in the NBA was difficult
C. he was an NBA star
D. it was boring to play basketball
According to the passage, growing lab meat is technically difficult because _________
A. meat is a tissue not difficult to be made artificially
B. it is too expensive to produce a single pound of lab meat
C. different cell types play different roles in flavors and mouth-feels
D. exact cell structure imitation is not essential to make the lab meat delicious
What is the main idea of this article?
A. The Mayan calendar was excellent.
B. The Maya were excellent farmers.
C. The Maya were intelligent people.
D. The Mayan cities were difficult to build.
The author mentions food, tools and precious metals and stones together because they are all ________. A. useful items B. articles of value C. difficult things to obtainD. material objects
She is an intelligent girl. She always has good ways to solve difficult problems.
A.开朗的
B.聪明的
C.乐观的
D.幽默的