I am busy preparing for the mid-term examination, so I can’t help____ housework.
It was a pity ______ John wouldnt be able to spend his vacation with me.
Our success depends ______ everyone works hard or not.
Though he is 10 years old, he doesnt know that 2 ______ by 4 makes 8.
The taxi ____ only hold six passengers. It is full. You____ take the next one.
I don’t doubt ______ for the journey by doing jobs on the ship.