Suppose A, B and C.
B.a，X，c
C.a，b，X
D.x、b、c
To sum up, the answers are A, B and C. Choose A. Because these three answers appear most frequently.
2. Thinking topic selection method.
Eliminate the answers that you think are impossible. When doing cloze, choose more words you know and grammar you have learned recently.
The probability of A is generally small, and the probability of success of B and C is large.
Of course, the best way is for you to learn English well. If you have nothing to do, go to the "College Entrance Examination" and give yourself some pressure and motivation.
This is the best way to increase your chances of learning English well.