Stressful environments lead to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.
It is______to everyone that the boy has been badly treated.
I still remember the day _______I first came to Beijing.
The worker_______left leg was broken was sent to hospital at once.
The weather turned fine , _______ made us very happy.
-_______do you spare time to visit your parents every month? -Twice.