________ the course very difficult，she decided to move to a lower level.(2013·北京，24)
#88738
A
Find
B
Finding
C
To find
D
Found
推荐题目
Happy times usually pass quickly without .
#93567
A
noticing
B
being noticed
C
having noticed
D
to be noticed
George Gould too visited the tomb, ____ a high fever the next day.
#88248
A
only to catch
B
caught
C
being caught
D
catching
In the weeks ________, we will say good bye to our dear teachers and friends at this great school.
#90903
A
following
B
followed
C
to follow
D
that followed
(2013·福建毕业班质检)It is said that sixty percent of all energy ________ in the world today is being lost as waste heat.
#89316
A
produced
B
producing
C
to produce
D
having produced