1. He never goes home _______ he has finished his work . A. before B. while C. because D. so 2. She had hardly left the room _______ the telephone rang. A. as B. since C. when D. after 3. That man followed me ________ I went. A. whenever B. while C. after D. before 4. I will lend you my new laptop ________ you promise me to use it with care. A. because B. until C. as long as D. soon 5. I will wait for you ________ you return. A. When B. since C. before D. till