When a new disease breaks out, experts must ________ what to do in the fastest way.
| A．figure out | B．take out | C．pick out | D．sort out |
55. All ____ not baked in one oven. (prov.)
| A．bread is | B．breads is | C．breads are | D．bread are |
56. He said under his breath that he would keep the secret. The underlined part means _____.
| A．loudly | B．shyly | C．politely | D．in a low voice |
57. The rain was coming down in buckets. This sentence means ____ .
| A．The rain was coming down into the buckets. | B．The rain was very heavy. |
| C．There was some rain in the buckets. | D．There were some buckets in the rain. |
58. The little boy has learned many Tang dynasty poems _____ though he is very young.
| A．by heart | B．by mind | C．by the way | D．by book |
59. Sorry, I took your pen _____.
| A．by heart | B．by mistake | C．on purpose | D．by the way |