An increasing number of learners are buying online courses in the belief ________ they are much convenient and cheaper.
A: which
B: if
C: whether
D: that
A: which
B: if
C: whether
D: that
举一反三
- There are several reasons why online courses are increasing in popularity. Which of the following sentences can support this main idea.
- There are several reasons why online courses are increasing in popularity. Which of the following sentences can support this main idea.（2.0分）
- Discount ticket is much cheaper and more convenient to change.
- Online courses keep learners very ______. A: happy B: busy C: satisfied D: free to do many things
- People prefer IP phone calls to ordinary ones because the former is ______. A: much more convenient B: more dependable C: much cheaper D: more efficient