___________ seasonal rainfall, especially in regions near the tropics, is winds that blow in an opposite direction in winter than in summer.
A. Causing
B. That cause
C. To cause
D. What causes

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Grammar › ViewCombine the sentences (formal)!
I know the doctor. The nurse is working with her.
A. I know the doctor with whom the nurse is working with.
B. I know the doctor with whom the nurse is working.
C. I know the doctor with who the nurse is working with.
D. I know the doctor whom the nurse is working with her.
Prepositions › View
Choose the sentence that is written correctly.
A. Most students feel about taking a vacation after one semester of Focus on Grammar.
B. Most students feel on taking a vacation after one semeseter of Focus on Grammar.
C. Most students feel like taking a vacation after one semester of Focus on Grammar.
By this time next month, we … enough food to send to the orphanage.
A. will collect
B. have collected
C. will have collected
D. will be collecting
Grammar › View
The siblings are hardworking. _________ usually do the laundries themselves.
A. We
B. Our
C. They
D. Their
