--When _______ we meet again? --_______ it any time you like.
It was sad to me that they, so poor themselves, ___________ bring me food.
______ the terrible earthquake in Japan not happened, people’s awareness _______drawn to the risk of being exposed to nuclear radiation.
_____ of their bad habits, the boys switched from being dependent on their parents to _____ for others.
Scientists ______ thousands of chemicals before they decided on the right one in the end.
To some extent, uncontrolled information from the website that many people turn _______ false.