III. Cloze: for each        It is no exaggeration to say that to work out on a regular basis is in fashion. Aerial yoga, for instance, _19_ in popularity over the past few years. Aerial yoga, _20_ anti-gravity yoga, relies on a soft hammock held up by chains and straps. Also, aerial yoga, together with many of the same benefits and enjoyments of regular yoga, _21_ three more advantages. One is greater flexibility, leading to a deeper stretch. _22_ is better focus for getting used to being suspended. The other is strengthened muscles, involving a great core workout to balance. _23_, some beginners find it a bit of slow to burn as many calories as possible for a short while. In a word, there are many branches of yoga, all of _24_ just cater to different kinds of potential followers. Just gear up and stretch out!
【題組】19.
(A) gained
(B) has gained
(C) had gained
(D) gains