The kind of input showing the learner what is grammatically correct is known asA．negative

（The simplest) kind of plant, （alike) the simplest kind of animal, （consists of) （only one

The passage mentions each of the following as an appropriate kind of governmental action E

What is the last part of the conversation about？A．The kind of people suitable for the trip

What evidence in the passage can show that Americans love museums？A．There are all kinds of

According to the passage, which of the following statements is true？A．All kinds of the unc

According to the comprehensive input theory, "i ＋1" refers toA．the current level of the le