21. Josh couldn’t open the door _____ the lock was broken.
A. because of B. therefore C. so D. due to the fact that
22. Let’s ask our teacher how to solve this problem _____ we are unable to answer.
A. since B. because of C. much as D. as long as
23. _____ the bad grease stain on the carpet, we had to rearrange the furniture before the company arrived.
A. Because B. Now that C. Due to D. Since
24. The mountain road was closed to all traffic _____ the heavy rainfall had caused a huge mudslide that blocked the way.
A. therefore B. as C. due to D. so
25. Janet called the security guard _____ someone had taken her briefcase while she was making a call at the public phone.
A. so that B. so C. because D. because of
26. _____ the flood has receded, people can move back into their homes.
A. Now that B. For C. So D. As much as
27. He doesn’t drink alcohol _____ his health.
A. because B. thanks to C. since D. on account of
28. _____ he’s been off sick all week, he’s unlikely to come.
A. Due to B. Seeing that C. Much as D. Irrespective of
29. Many exam candidates lose marks _____ they do not read the questions properly.
A. because of B. in spite of the fact that
C. owing to the fact that D. therefore
30. _____ the pilots’ strike, all flights have had to be cancelled.
A. Because B. Although C. Despite D. As a result of
