【正文】
ch ( ) 2. The main problem is whether ______ abroad. A. work B. works C. working D. to work ( ) 3. I have many friends. I don’t know whom ______ first. A. talk with B. to talk C. to talk with D. talk ( ) 4. I’m not sure which restaur ant ______ because I haven’t been here for long. A. to be eating B. to eat