If _____ carefully, the experiment will be successful.
English differs from Spanish in ______ it is not pronounced as it is written.
. Who do you think will ______ the company if the manager retired?
You shouldn’t have the machines ______ all the while. You ought to have them ______ now and then.
--- Did you go to the show last night?--- Yeah. Every boy and every girl in the area ______ invited.
With no bridge, they had to swim across the river to the _______ bank to ______ the news.