Everyone here will thank the firefighter for the things they have done to prevent fires______ the environment safer.
There’s no way of knowing why one man makes an important discovery another man, also intelligent, fails.
What we all know is that new technology is being ________to almost every industrial process.
It was not until last week_______ she found________ she thought was quite mistaken.
—Brad was Jane’s brother! — _____ he reminded me so much of Jane!
—Hurry up! Alice and Sue are waiting for you at the school gate. —Oh! I thought they________ without me.