UK Prime Minister Cameron has become the first world leader ______ to fly onboard Air Force One with US Prsident Obama.

.The man insisted _________ a taxi for meeven though I told him I lived nearby.

beginning of a speech, it is very important to grab the audience’s attention and make them interested in ______ you have to say.

One of the firms I applied to has offered me a job but I _____ my options open until I hear from the others.

Isn’t it hard to drive downtown to work? —Yeah, that’s why I ______ to work by train