问题：
[单选] 23. Try not to cough more than you can ___ since it may cause problems to your lungs.A . check
B . allow
C . stop
D . help
参考答案：D
参考解析：
本题暂无解析
23. Try not to cough more than you can
23. Try not to cough more than you can ___ since it may cause problems to your lungs.
