_______ is a fact that English is accepted as an international language.
A. What
B. This
C. That
D. It
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Spring is the season _______ flowers are in full bloom.
A. whose
B. which
C. when
D. its
The sun heats the earth, _______ is very important to living things.
A. it
B. that
C. where
D. which
Yesterday the teacher told the students, “You will learn two lessons this week.”=Yesterday the teacher told the students that _______.
A. you will learn two lessons this week
B. they would learn two lessons this week
C. they will learn two lessons this week
D. you would learn two lessons this week
_______ you see it, you will never forget it.
A. Since
B. Once
C. Before
D. As soon as