Joanna is no less hardworking than her twin sister, _______ she failed in the final exam

It is not always easy for the public to see _______ use a new invention can be of to human life.

Only by working hard succeed.

Lucy and I have been friends for years. my memory is correct，we first met in a meeting.

Would you like to drink _________ orange—Yes, I’d love to. But there isn’t _________ orange in the glass.