Question

れな

四角のI番の1問から5問目の答え教えて頂きたいです！お願いします！！

( 内のどちらの語句が最も適切か考えてみましょう。
1. The singer (came / has come ) to Japan two years ago and will come again next month.
2. “I ( didn't see / haven't seen) him since last Friday.” “I heard he's been sick."
3. "I ( didn't send / haven't sent) him the letter yet." "You should hurry up."
4. Paul (played / has played) baseball when he was in junior high school.
5. Bob and Tom (have played / have been playing) tennis since 2:00. They must be tired.