2.It’s said that he ___ sent to Australia to improve his English.

2.It’s said that he ___ sent to Australia to improve his English.
2.It’s said that he ___ sent to Australia to improve his English.

2.It’s said that he ___ sent to Australia to improve his English.
.It’s said that he has been sent to Australia to improve his English.
应该是has been,用现在完成时

had been

has been

has been,没有时间状语是往往指的是现在。